Abstract
Adhesive bonding failure is one of the main failure modes threatening the safety of the wind turbine blade (WTB), which drives fatigue performance analysis of adhesive bonding becoming a vital issue. Attributed to the high cost and sample scarcity of full-scale structural testing of WTBs, fatigue analysis of adhesive-bonded composite joints becomes a critical way to investigate the bonding properties. Adhesive bonding distributes in WTB with different sizes; thus, the fatigue performance in different place have a large difference. The existing researches mainly perform fatigue properties studies on the standard specimens, while the effects of bonding size on structural fatigue properties are ignored. With these concerns, a finite element method based on Cyclic Cohesive Zone Model theory is proposed, and size effects on fatigue properties are studied for adhesive-bonded composite joints in this paper. The results can be used for fatigue performance analysis for WTB adhesive bonding.
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